Here is the new one-handed keyboard for Windows 10 on phablets
Although Microsoft rattled off numerous new apps found in Windows 10 Technical Preview for Phone build 10051, one feature we previously did not know about slipped by us: one-handed thumb keyboard for large screen phones.
Evidently, Microsoft is giving users an option to have the full-sized keyboard, or a smaller ‘squished’ one that justifies left or right, depending on your preferred hand usage.
AIVAnet 